Masterbating after accoplishing something, or after being proud of ones' self
A guy has been crushing on a girl for a while and finally get her number/a date
Guy 1: Dude im so happy, this girl is so hot.
Guy 2: So what you going to do are u going to call her up
Guy 1: No i think imma head out for a congratsubating session. See you later
GUy 2: WTF MAN!! GROSS